CFEngine

bundle agent main
{
  files:
    "/tmp/hello.txt"
      create => "true",
      edit_line => insert_lines("Hello, World!"),
      comment => "Ensure hello.txt exists with greeting";

  reports:
    "CFEngine policy applied successfully";
}

body common control
{
  bundlesequence => { "main" };
}

bundle edit_line insert_lines(text)
{
  insert_lines:
    "$(text)";
}